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[hanychen]

VB 語法:
Declare Function OpenModbusSerial Lib "DMT.dll" (ByRef buf As Byte, ByVal baud_rate As Long, ByVal data_len As Long, ByVal parity As Byte, ByVal stop_bits As Long, ByVal modbus_mode As Long) As Long

我將它改寫成 :
Declare long OpenModbusSerial in DMT.dll short @ buf, long baud_rate, long data_len, string parity, long stop_bits, long modbus_mode

=OpenModbusSerial("COM1", 9600, 7, 'E', 1, 1)
出現錯誤訊息 Data type mismatch
我在想應該是 @ buf 這個出錯, 請問各位 要如何傳遞位址參數?